Neat oil

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Foots oil , neatsfoot oil or claws lard ( neatsfoot oil , Bubulum Oil) is an animal fat selected from the horny substance of the claw and the foot bones of cattle , horses and sheep, can be obtained. In addition to this, the less pure bone oil or bone fat can be obtained from bones by boiling or solvent extraction. Hoof oil has a historical significance as a technical oil , especially as a watchmaker's oil .

Manufacture and properties

Foot oil is obtained from the feet of slaughtered animals with little addition of heat below the boiling point. Then it is left to stand in the cold for a long time, separated from the stearin which has separated out and brought into contact with bare strips of lead in closed vessels, whereupon a whitish slime settles. The oil that has remained liquid (especially olein ) is poured off and is thin, does not thicken and does not go rancid easily. It is light yellow and has a "pleasant taste".

In the composition the oil contains a mixture of oleic, myristic , palmitic , stearic , arachidic , tetradecenic , hexadecenic , linoleic and linolenic acids as well as other unsaturated fatty acids. Also included are various glycerides such as palmitodiolein , hexadecendiolein , polyolefin , diolein and others.

use

The very pure claw oil was mainly used as watchmaking oil to lubricate the precision mechanics of watches and other machines. The common bone fat was used to make hair oil , to make leather , to lubricate iron and steel and to make soaps . The use of bone oil to oil wooden handles in knife construction is also known. In pharmacy and cosmetics, beef nails oil is used as an ointment base .

supporting documents

  1. ↑ Claw fat. In: Johann Christoph Adelung : Grammatical-critical dictionary of the high German dialect. Volume 2. Leipzig 1796, p. 1610. Digitized at zeno.org, accessed on January 14, 2015.
  2. ↑ Claw fat. In: Pierer's Universal Lexicon . Volume 9. Altenburg 1860, p. 556.Digitized from zeno.org, accessed on January 14, 2015.
  3. ↑ a b claw fat. In: Meyers Großes Konversations-Lexikon . Volume 11. Leipzig 1907, p. 97.Digitized from zeno.org , accessed on January 14, 2015.
  4. ↑ Horst Wilhelm Petersen: What is that? Collection of popular names of fabrics and products from nature. Directa, 2007, p. 129.
  5. ↑ a b Bos taurus. In: Karl Hiller, Matthias F. Melzig (Hrsg.): Lexicon of medicinal plants and drugs. Volume 1: A – K , Spektrum Akademischer Verlag, Heidelberg 1999, ISBN 978-3-8274-0387-2 , accessed on January 14, 2015.